Physiologically speaking, they're two different tissues. Adipose (fatty) tissue is found under the skin, sandwiched between muscles, and around internal organs like the heart. Muscle tissue — which can be further broken down into three main types — is found throughout the body.

Weight training helps to build up the muscle tissue in and around any fat tissue. The best way to reduce fat tissue is to eat a diet that incorporates vegetables, whole grains, lean proteins, and healthy fats like those found in olive oil and fish.

Myth: Puzzles and games are great workouts for your brain.

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Truth: Plain old physical exercise seems to be better for brain health than any type of mental puzzle available, according to a wealth of research. A spate of recent studies suggests that aerobic exercise — any kind of activity that raises your heart rate and gets you moving and sweating for a sustained period — has a significant, overwhelmingly beneficial effect on the brain.

When it comes to boosting your mood, improving your memory, and protecting your brain against age-related cognitive decline, exercise may be as close to a wonder drug as we'll get.